To Burn-in captions to your video:
Click Generate on your video.
Use the toggle Burned-in captions to enable closed captions to be displayed.
Select the blue Generate button.
Captions will be included on the video and these will not be able to be switched off by the user.
To learn more about the different caption options, see the What are the key differences between closed captions, burned-in captions, and dynamic captions? article.
Notes:
Use the video 3-dot menu to download your video subtitles/captions once the video is generated. You are able to download your captions in .srt or .vtt